diff --git a/challenges/04-maps/01/style.scss b/challenges/04-maps/01/style.scss
new file mode 100644
index 0000000..ac84897
--- /dev/null
+++ b/challenges/04-maps/01/style.scss
@@ -0,0 +1,37 @@
+@use "sass:map";
+
+$breakpoints: (
+  small: 30em,
+  medium: 45em,
+  large: 65em,
+  xl: 80em,
+);
+
+@mixin mq($size) {
+  $breakpoint: map.get($breakpoints, $size);
+
+  @media screen and (min-width: $breakpoint) {
+    @content;
+  }
+}
+
+body {
+  // all of these should work
+  @include mq(medium) {
+    background: pink;
+  }
+  @include mq(500px) {
+    background: lightblue;
+  }
+  @include mq(100em) {
+    background: #efefef;
+  }
+
+  // these should fail, with an error telling me why
+  @include mq(reallysmall) {
+    background: yellow;
+  }
+  @include mq(5000) {
+    background: purple;
+  }
+}
diff --git a/challenges/05-partials/01/main.scss b/challenges/05-partials/01/main.scss
index 26c3c6a..c17e6f3 100644
--- a/challenges/05-partials/01/main.scss
+++ b/challenges/05-partials/01/main.scss
@@ -2,6 +2,5 @@
 @use "abstracts/font-sizes";
 
 .card {
-  font-size: $fs-400;
-  color: $clr-primary;
+  
 }
diff --git a/projects/02-tshirts/00-blank-starter/src/scss/style.scss b/projects/02-tshirts/00-blank-starter/src/sass/style.scss
similarity index 100%
rename from projects/02-tshirts/00-blank-starter/src/scss/style.scss
rename to projects/02-tshirts/00-blank-starter/src/sass/style.scss
diff --git a/projects/02-tshirts/01-the-html/src/scss/style.scss b/projects/02-tshirts/01-the-html/src/sass/style.scss
similarity index 100%
rename from projects/02-tshirts/01-the-html/src/scss/style.scss
rename to projects/02-tshirts/01-the-html/src/sass/style.scss
diff --git a/projects/02-tshirts/02-abstracts/src/scss/style.scss b/projects/02-tshirts/02-abstracts/src/sass/style.scss
similarity index 100%
rename from projects/02-tshirts/02-abstracts/src/scss/style.scss
rename to projects/02-tshirts/02-abstracts/src/sass/style.scss
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diff --git a/projects/04-chef/design/BeyondCSS Personal Chef Services.fig b/projects/04-chef/design/BeyondCSS Personal Chef Services.fig
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diff --git a/projects/04-chef/styleguide.md b/projects/04-chef/styleguide.md
new file mode 100644
index 0000000..80e46e2
--- /dev/null
+++ b/projects/04-chef/styleguide.md
@@ -0,0 +1,30 @@
+# Personal Chef Services - Style guide
+
+## Typography
+
+### Fonts
+
+- Abril Fatface
+- Lato
+
+### Font sizes
+
+- 80px
+- 60px
+- 27px
+- 21px
+- 18px
+
+## Colors
+
+### Primary
+
+- 400: #FF6635
+- 500: #DD4E11
+
+### Neutral 
+
+- 900: #212121
+- 400: #5C5C5C
+- 200: #F8F8F8
+- 100: #FFFFFF
\ No newline at end of file